What is the relationship between Nur and Imtiaz Begum in In Custody?

Imtiaz is the second wife of Nur. Nur also has a first wife who is older than Imtiaz.
When Deven finally gets to meet Nur, he's unimpressed by the way the man lives. One of the worst things about his living situation is his flamboyant younger wife, Imtiaz Begum. Deven immediately dislikes her. He dislikes the way she's created a spectacle of their living quarters, how she acts, and how she dresses. He thinks that she's copying Nur's work. He says that she looks like any dancing girl or prostitute.
When Nur and Deven leave the room, she follows them. She yells at Nur for leaving and says that he can't stand being around a crowd that isn't there for him. She drops money that she made from reciting her poetry onto the ground while chastising her husband. It's clear that they aren't happy and that they resent each other.